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Application of Galvo Scanner in LIDAR

Release time:2016-04-18 15:15

Light Laser Detection and Ranging, LIDAR,
is one kind of radar system that assists to detect objectives’ position,
velocity, etc. by laser beam. With laser as media, pulse laser, reflected by oscillating
mirrors inside a galvo scanner, scatters onto objects such as plants, roads and
construction on ground. Part of reflected light wave that is received by LIDAR will
be taken into account along with laser’s height and its scanning angle, thus the
coordinate of each light spot cast can be achieved. Continuous laser scanning
in this way brings multiple spots’ data and accurate 3D images.

LIDAR is a
state-of-the-art detecting method that involves laser and modern photoelectric
technique. Apart from being used to acquire 3D geographic information, it is
also widely seen in resource exploration, urban planning, agricultural
development, water conservancy projects, land use, environmental monitoring,
traffic and communication, earthquake prevention and disaster reduction, driverless
vehicles, etc. LIDAR operates at a much higher frequency than microwaves with
the following advantages:

A. High definition

B. Good stealthiness & interfering
resistance

Concentrated laser beam navigated in
straight route can hardly be intercepted unless it is cut in its way. Since few
signal sources can interfere with the LIDAR in nature, LIDAR is strongly resistant
to active interference.

C. Good detecting performance at
low altitude

When it comes to low altitude,
microwave radar has, to some extent, blind areas, because of echo reflected
from objects on the ground. For LIDAR, only laser-cast objectives reflect. Without
echo’s effect, LIDAR can work at “zero height”.